Optic flow representation in the optic lobes of Diptera: Modeling innervation matrices onto collators and their evolutionary implications

John K. Douglass, N. J. Strausfeld

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A network model of optic flow processing, based on physiological and anatomical features of motion-processing neurons, is used to investigate the role of small-field motion detectors emulating T5 cells in producing optic flow selective properties in wide-field collator neurons. The imposition of different connectivities can mimic variations observed in comparative studies of lobula plate architecture across the Diptera. The results identify two features that are crucial for optic flow selectivity: the broadness of the spatial patterns of synaptic connections from motion detectors to collators, and the relative contributions of excitatory and inhibitory synaptic outputs. If these two aspects of the innervation matrix are balanced appropriately, the network's sensitivity to perturbations in physiological properties of the small-field motion detectors is dramatically reduced, suggesting that sensory systems can evolve robust mechanisms that do not rely upon precise control of network parameters. These results also suggest that alternative lobula plate architectures observed in insects are consistent in allowing optic flow selective properties in wide-field neurons. The implications for the evolution of optic flow selective neurons are discussed.

Original languageEnglish (US)
Pages (from-to)799-811
Number of pages13
JournalJournal of Comparative Physiology - A Sensory, Neural, and Behavioral Physiology
Volume186
Issue number9
DOIs
StatePublished - Nov 11 2000

Keywords

  • Computational maps
  • Evolution
  • Lobula plate
  • Optic flow
  • Visual processing

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Animal Science and Zoology
  • Behavioral Neuroscience

Fingerprint Dive into the research topics of 'Optic flow representation in the optic lobes of Diptera: Modeling innervation matrices onto collators and their evolutionary implications'. Together they form a unique fingerprint.

Cite this